More than a century on from the Wright brothers' first artificial flight, scientists hailed the "historic" test of the new technology, which could eventually slash greenhouse-gas emissions from aviation.

The study showed that supplying electric current to purple phototrophic bacteria can recover nearly 100 per cent of carbon from any type of organic waste, while generating hydrogen gas for electricity production

Aside from its colourful stain-glassed windows and ornate calligraphy, this mosque stands out for another reason: Its roof is covered with shining solar panels that make the building's carbon emissions close to zero

Health care workers in these areas often lack electricity to power diagnostic devices, and commercial batteries may be unavailable or too expensive. New power sources are needed that are low-cost and portable

The Lok Sabha Deputy Speaker said that there was a commitment to increase the share of non-fossil fuel-based electricity to 40 per cent by 2030 and added that the government was extending full support to make it happen